Citation: Irvine MK, Levin B, Robertson MM, Penrose K, Carmona J, Harriman G, Braunstein SL, Nash D. PROMISE (Program Refinements to Optimize Model Impact and Scalability based on Evidence): a cluster-randomised, stepped-wedge trial assessing effectiveness of the revised versus original Ryan White Part A HIV Care Coordination Programme for patients with barriers to treatment in the USA. BMJ Open. 2020 Jul 27;10(7):e034624. doi: 10.1136/bmjopen-2019-034624. PMID: 32718922.